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AdS/CFT対応において複数の鞍点をもつエンタングルメントエントロピー

Jun Tsujimura

Published Mar 27, 2023• 0 citations
OpenAlex

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Quantum Key Distribution for ADS-B Data Transmission Security in Aircraft

Ahmad Zaher, Judy Rabaa, Lanke Ravi Kumar +1 more

This research aims to investigate the security concerns of Automatic Dependent Surveillance-Broadcast (ADS-B) communication in the aviation industry and propose the Quantum Key Distribution (BB84) algorithm to generate a symmetric key using the principles of quantum mechanics and use it as a secret key for all encryption/decryption algorithms used in the ADS-B system to increase the security level and avoid any security concerns. ADS-B is a critical technology for air traffic control, providing real-time position and velocity information to air traffic controllers. However, the security of ADS-B communication is a major concern, as it is vulnerable to various security threats, including eavesdropping, data manipulation and injection attacks that could lead to accidents and loss of life. To ensure safe and efficient air travel, A reliable and secure communication system for ADS-B is essential. In this study, we will provide a comprehensive literature review of ADS-B communication and existing encryption methods. We will evaluate the performance of the proposed BB84-Quantum algorithm through simulations and assess its effectiveness in securing ADS-B communication. Our research aims to provide insight into the potential application of the proposed algorithm in the aviation industry. The proposed algorithm's originality lies in its use of quantum mechanics principles to provide secure communication between aircraft and ground stations, ensuring a safe connection for sending and receiving messages in ADS-B packets.

International Conference on Computing, Communication and Networking Technologies (ICCCNT)•Jul 6, 2023•3 citations

Composite AdS geodesics for CFT correlators and timelike entanglement entropy

Hardik Bohra, Allic Sivaramakrishnan

We study how to recover timelike worldlines in AdS from CFT data as a toy model for holographically reconstructing realistic observers. We give a bulk extremization procedure that determines composite timelike-spacelike geodesics that connect timelike-separated boundary points. The total geodesic length matches the length extracted from CFT correlators at the timelike-separated points. We show agreement in Poincaré AdS, for generic boundary points in global AdS, and also for the BTZ solution, in which the timelike segment probes behind the horizon. We refine related methods to compute timelike entanglement entropy in AdS$_3$/CFT$_2$ and recover known results.

hep-thCross-listedarXiv:2511.22168•Nov 28, 2025
This research aims to investigate the security concerns of Automatic Dependent Surveillance-Broadcast (ADS-B) communication in the aviation industry and propose the Quantum Key Distribution (BB84) algorithm to generate a symmetric key using the principles of quantum mechanics and use it as a secret key for all encryption/decryption algorithms used in the ADS-B system to increase the security level and avoid any security concerns. ADS-B is a critical technology for air traffic control, providing real-time position and velocity information to air traffic controllers. However, the security of ADS-B communication is a major concern, as it is vulnerable to various security threats, including eavesdropping, data manipulation and injection attacks that could lead to accidents and loss of life. To ensure safe and efficient air travel, A reliable and secure communication system for ADS-B is essential. In this study, we will provide a comprehensive literature review of ADS-B communication and existing encryption methods. We will evaluate the performance of the proposed BB84-Quantum algorithm through simulations and assess its effectiveness in securing ADS-B communication. Our research aims to provide insight into the potential application of the proposed algorithm in the aviation industry. The proposed algorithm's originality lies in its use of quantum mechanics principles to provide secure communication between aircraft and ground stations, ensuring a safe connection for sending and receiving messages in ADS-B packets.
We study how to recover timelike worldlines in AdS from CFT data as a toy model for holographically reconstructing realistic observers. We give a bulk extremization procedure that determines composite timelike-spacelike geodesics that connect timelike-separated boundary points. The total geodesic length matches the length extracted from CFT correlators at the timelike-separated points. We show agreement in Poincaré AdS, for generic boundary points in global AdS, and also for the BTZ solution, in which the timelike segment probes behind the horizon. We refine related methods to compute timelike entanglement entropy in AdS3_33​/CFT2_22​ and recover known results.